US4649185AExpiredUtility

Contact lens comprising trimethylvinylsilane polymer

Assignee: SHINETSU CHEMICAL COPriority: Apr 23, 1984Filed: Nov 15, 1985Granted: Mar 10, 1987

Est. expiryApr 23, 2004(expired)· nominal 20-yr term from priority

Inventors:Minoru Takamizawa Akira Yamamoto Toshinobu Ishihara Shigehiro Nagura

G02B 1/043C08F 30/08

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Claims

Abstract

The contact lens of the invention is shaped of a poly(trimethylvinylsilane) resin having an average molecular weight of at least 200,000 or a copolymer based thereon. The contact lens has a very high oxygen permeability comparable to conventional transparent silicone rubbers so as to ensure a long time of continued wearing of the lens on the cornea with no adverse physiological influences and the material still has much better mechanical workability for precision shaping into a lens form than the transparent silicone rubbers.

Claims

exact text as granted — not AI-modified

What is claimed is: 
     
       1. A contact lens which is a lens wearable on the cornea made by shaping a polymeric resin comprising a poly(trimethylvinyl silane) having an average molecular weight of at least 200,000 and wherein the polymeric resin contains at least 50% by weight of a poly(trimethylvinyl silane). 
     
     
       2. The contact lens as claimed in claim 1 wherein the poly(trimethyl vinyl silane) has an average molecular weight of at least 400,000.

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